Consulta: subjectFacets:"Iron deficiency"
Registros recuperados: 6
Data/hora: 12/06/2024 05:59:54

Respuesta fisiológica de lineas de frijol tolerante y susceptible a clorosis férrica
Provedor de dados: 32
Autores: Zavala Estrada, Fabiola.
La clorosis por deficiencia de hierro (Fe) es un estrés abiótico encontrado principalmente en  cultivos que crecen en suelos calcáreos o alcalinos (Rombolà y Tagliavini, 2007). Como  resultado de la deficiencia de Fe se altera la morfología y fisiología de las plantas (Bertamini  y Nedunchezhian, 2005). Se determinaron algunos cambios anatómicos en hojas jóvenes y  fisiológicos en la raíz de plantas de frijol (Phaseolus vulgaris L.) tolerante y susceptible a  clorosis férrica que ocurren cuando éstas se someten a estrés de hierro para identificar la  respuesta diferencial de las dos líneas en estas condiciones. En la hoja clorótica de la línea  tolerante la estructura del mesófilo se mostró organizada pero, con el parénquima esponjoso  más compactado y con...
Tipo: Tesis
Palavras-chave: Phaseolus vulgaris; Deficiencia de hierro; Cloroplastos; Fotosíntesis; Concentración nutrimental; Maestría; Phaseolus vulgaris; Iron deficiency; Chloroplasts; Photosynthesis; Nutrimental concentration.
Ano: 2009
URL: http://hdl.handle.net/10521/1314

Morphological and functional alterations of the intestine of rats with iron-deficiency anemia
Provedor de dados: 56
Autores: Wayhs,M.L.C.; Patrício,F.S.R.; Amancio,O.M.S.; Pedroso,M.Z.; Fagundes Neto,U.; Morais,M.B.
The present study was designed to assess the intestinal absorption of D-xylose and jejunal morphometry in rats with iron-deficiency anemia. Male Wistar rats were randomly divided into a control group (diet containing 50 mg Fe/kg, N = 12) and an anemic group (diet containing &lt;5 mg Fe/kg, N = 12). The animals were housed in individual metabolic cages and deionized water and diet were provided ad libitum for 6 weeks. Hemoglobin and hematocrit were determined at 0, 2, 4, and 6 weeks. At the end of the study the rats were submitted to a D-xylose absorption test (50 mg/100 g body weight) and sacrificed and a jejunal specimen was obtained for morphometric study. At the end of the study the hemoglobin and hematocrit of the anemic rats (8.7 ± 0.9 g/dl and 34.1 ±...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Iron deficiency; Anemia; Jejunal villus height; Jejunal mucosal thickness; Jejunal epithelial surface.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001100006

Disaccharidase levels in normal epithelium of the small intestine of rats with iron-deficiency anemia
Provedor de dados: 56
Iron-deficiency anemia is the nutritional deficiency most frequently occurring throughout the world, which manifests as a complex systemic disease involving all cells, affecting enzyme activities and modifying protein synthesis. In view of these considerations, the objective of the present study was to determine the effects of iron-deficiency anemia on disaccharidases and on the epithelial morphokinetics of the jejunal mucosa. Newly weaned male Wistar rats were divided into 4 groups of 10 animals each: C6w received a standard ration containing 36 mg elemental iron per kg ration for 6 weeks; E6w received an iron-poor ration (5-8 mg/kg ration) for 6 weeks; C10w received an iron-rich ration (36 mg/kg ration) for 10 weeks; E10w received an iron-poor ration for...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Disaccharidases; Anemia; Iron deficiency; Intestinal mucosa.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000700005

Dietary cellulose has no effect on the regeneration of hemoglobin in growing rats with iron deficiency anemia
Provedor de dados: 56
Autores: Catani,M.; Amâncio,O.M.S.; Fagundes-Neto,U.; Morais,M.B.
The objective of the present study was to determine the effect of cellulose on intestinal iron absorption in rats during recovery from iron deficiency anemia. Twenty-one-day-old male Wistar-EPM rats were fed an iron-free ration for two weeks to induce anemia. At 5 weeks of age, the rats were divided into two groups (both groups receiving 35 mg of elemental iron per kg diet): cellulose group (N = 12), receiving a diet containing 100 g of cellulose/kg and control (N = 12), receiving a diet containing no cellulose. The fresh weight of the feces collected over a 3-day period between the 15th and 18th day of dietary treatment was 10.7 ± 3.5 g in the group receiving cellulose and 1.9 ± 1.2 g in the control group (P&lt;0.001). Total food intake was higher in the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Iron deficiency; Dietary fiber; Cellulose; Iron absorption.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000600002

Relation of the disaccharidases in the small intestine of the rat to the degree of experimentally induced iron-deficiency anemia
Provedor de dados: 56
Autores: Vieira,M.R.; Galvão,L.C.; Fernandes,M.I.M.
Hypolactasia associated with severe iron-deficiency anemia has been reported in several studies. The objective of the present study was to determine whether hypolactasia is associated with the degree and duration of iron-deficiency anemia. Newly weaned male Wistar rats were divided into a control group receiving a diet supplemented with iron (C) and an experimental group (E) receiving a diet not supplemented with iron (iron-deficiency diet). The animals were studied on the 3rd, 5th, 7th, 14th, 21st, 28th and 35th days of the experiment, when overall and iron nutritional status and disaccharidase activity in the small intestine were determined by the Dahlqvist method. A reduction in weight occurred in the anemic animals starting on the 5th day of the study....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Disaccharidases; Lactase; Anemia; Iron deficiency; Intestinal mucosa.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000500008

Influence of iron on mineral status of two rice (Oryza sativa L.) cultivars
Provedor de dados: 61
Autores: Silveira,Vivian C. da; Oliveira,Anna P. de; Sperotto,Raul A.; Espindola,Luciana S.; Amaral,Lívio; Dias,Johnny F.; Cunha,João B. da; Fett,Janette P.
Iron is an essential nutrient for plants. In aerobic conditions, Fe is highly unavailable for plant uptake, and Fe deficiency can be severe in plants grown in calcareous soils. In waterlogged soils, however, Fe availability increases and can reach toxic concentrations. Rice is an important staple crop worldwide and faces iron deficiency or excess, depending on the growth conditions. To contribute to the study of mechanisms involved in response to Fe deficiency and resistance to Fe excess, experiments were carried out with rice cultivars BR-IRGA 409 (I409, susceptible to Fe toxicity) and EPAGRI 108 (E108, resistant to Fe toxicity) grown in culture solutions and submitted to Fe excess, control concentration or deficiency (500, 6.5 or zero mg L-1 Fe,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ferritin; Iron deficiency; Iron toxicity; Mössbauer spectroscopy; Oryza sativa; PIXE.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200005